Few of the flashes(Atmel, Macronix and SST) require to clear BP# bits in flash power ups.

So clear these BP# bits at probe time, so-that the flash is ready for user operations.

Signed-off-by: Jagannadha Sutradharudu Teki jaganna@xilinx.com --- Changes for v5: - Added macro for conditional compile Changes for v4: - none Changes for v3: - none Changes for v2: - none

drivers/mtd/spi/spi_flash_probe.c | 7 +++++++ 1 file changed, 7 insertions(+)

diff --git a/drivers/mtd/spi/spi_flash_probe.c b/drivers/mtd/spi/spi_flash_probe.c index 199eab8..4659134 100644 --- a/drivers/mtd/spi/spi_flash_probe.c +++ b/drivers/mtd/spi/spi_flash_probe.c @@ -203,6 +203,13 @@ struct spi_flash *spi_flash_validate_ids(struct spi_slave *spi, u8 *idcode) flash->sector_size = params->sector_size; flash->size = flash->sector_size * params->nr_sectors;

+ /* Flash powers up read-only, so clear BP# bits */ +#if defined(CONFIG_SPI_FLASH_ATMEL) || \ + defined(CONFIG_SPI_FLASH_MACRONIX) || \ + defined(CONFIG_SPI_FLASH_SST) + spi_flash_cmd_write_status(flash, 0); +#endif + return flash; }